
BenchmarksGB
Find and log OS benchmarks
USD 2.99 · Designed for iPad
A new app to help identify and log Ordnance Survey benchmarks
BenchmarksGB: Discover, Identify & Log Britain’s Ordnance Survey Benchmarks.
Whether you’re a keen walker, a history lover, or simply enjoy exploring Britain’s hidden details, BenchmarksGB turns every outing into a mini treasure hunt.
BenchmarksGB is the easiest way to spot, learn about, and record the historic Ordnance Survey benchmarks scattered across Great Britain. These engraved marks - used to measure height above sea level before modern surveying - can still be found on older buildings, bridges, churches, and walls all around the country. There are over 500,000 of them listed in the Ordnance Survey archive.
Using data from this archive, BenchmarksGB displays benchmark locations on an interactive map, helping you find them while out walking, exploring, or travelling.
With the app you can:
• See benchmark locations using detailed OS archive data
• Record your visits and mark whether each benchmark is still present
• Track your progress as you spot more across the country
• Add an extra layer of fun to your walks and holidays
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Improved instructions
The developer, SailTrack Limited, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- SailTrack Limited
- Size
- 70.2 MB
- Category
- Entertainment
- Compatibility
Requires iOS 18.4 or later.
- iPhone
Requires iOS 18.4 or later. - iPad
Requires iPadOS 18.4 or later. - Mac
Requires macOS 15.4 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.4 or later.
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2025 SailTrack Ltd
